Grease gun



April 20 1926= 1,581,995

J. ETTEMA GREASE GUN Filed Nov. 27. 1923 0556;0/2 fliiema I /4M 57/ l 127% Patented Apr. 20, 1926.

UNITED STATES testes JOSEPH Erma-Ma, or 'nns'r'nn, roWA.

ennnsn Gun.

T 0 (all "to/lam it may] concern Be it known that JosErH ETTEMA, a citizen of the United States, residing at Lester, in the county'of Lyon and-State of Iowa, has invented new and useful Improvements in Grease Guns, of which the following is a specification. i

In grease guns heretofore'used, it is necessary to screw the shank of the plunger back so that the plunger-may position adjacent the cap before it is possible to remove the cap for refilling. Obviously, this takes considerable time, hence it is the purpose of the present invention 'to provide a grease gun including means to obviate this ditliculty and to save time and labor in refilling the gun.

Another purpose is to provide a grease gun having a marginal circular .fiange at its up per edge with which a split cap engages to retain the cap on the end of the grease gun casing, there being means for holding the two sections of the cap in position while in engagement with the end of the casing.

It is to be understood that the particulars herein given are in no way limitative and that, while still keeping within the scope of the invention, any desired modifications of detail and desired proportions may be made in the apparatus according to the circumstances.

The invention comprises further features and combinations of parts to be hereinafter set forth, shown claimed.

In the drawings: Figure 1 is a View in perspective of the improved grease gun constructed in accordin the drawings and ance with the invention.

Figure 2 is a vertical sectional view through the sameon line 2-2.bh10f.

Figure 3 1s a cross sectional view on hne 3-3 of Figure 1, showing the. construction of the cap and how the two sections are clamped in engagement with the end'of the grease gun casing. H

Referring to the drawings, 1 designates the grease gun casing which may be of any suitable proportion and shape. The casing may be constructed of any suitable metal, preferably tubular material, and is provided with an outlet tube 2 which has a nozzle 3 by which the grease may be applied to the parts to be lubricated. The upper end of the easing through which the casingis filled has an annular flange 4, and 5 denotes a cover.'

This cover comprises two semi-cylindrical sections 6 hingedly connected, as at 7. The cover adjacent its end wall has an annular recess or groove 8 which corresponds to and receives theannular flange at at the end of the casing, that is, when the two sections of the cover are clamped in position' fThe two sections of the cover are provided with bosses 9 which are semi-hexagonal shaped so that, when the two sectionsof the cover are clamped in position onthe grease gun casing, the bosses 9 represent a nut. The two" bosses 9 have semi-cylindrical threaded cavities which,when the "two sections are clamped together, afford a threaded bore for thereception of the threaded shank 10 of the plunger 11 which operates in the grease gun casing. The other end of the shank 10 has a handle 12 by which the shank may be rotatedfor feeding the plunger into the grease gun casing. In fact, the inner end of the shank is swivelled in a conventional manner to the plunger so that the shank may rotate without rotating the plunger 1 I The grease or lubricant is placed in the grease gun casing between the plunger 11 and the closed end of the casing which carriesthe outlet tube 2. In using the grease gun, the nozzle 3 of the tube 2 is engaged with that part which is to be lubricated, then the shank is rotated, causing the plunger to move through the casing, forcing the grease or lubricant through the. tube 2 until it escapes at the nozzle 8 and is caused to be applied to the part to be lubricated.

Riveted at 13 to one of the sections of the cover is a spring clasp 14 which terminates in a right-angled shoulder 15 for snapping intoengagement with alug or rib 16 constituting a shoulder carried by the other section of the cover, that is, when the two sections of the cover are placed in engagement so that the flange 4 may enter the annular groove or channel 8. It will be noted that when the plunger is pressing against the grease or lubricant, the cover-5 willnot dera'rsnr GEE-E65.

and having a threaded shank, a cover comprising two half-sections hingedly united, the adjacent faces of the two half-sections having semi-circular recesses with threads to engage the threads of the shank, the interior surface of the cover having an annular groove to receive said annular rib to prevent the cover from backing off, and a clasp carried on the exterior of one section with disengageable means with the other section to clamp the two sections together.

2. grease gun comprising a casing provided with discharge means at one end and having its other end open,v a plunger operable in said casing and having a threaded shank, a cover for the open end of the casing comprising two haltsections hingedly united, the adjacent faces of the halflsections having threaded seats to engage the threads of the shank, whereby the sections of the cover may be spread apart and toward each other for quickly attaching and detaching the cover to the shank, means for clamping the two sections on the open end of the casing and means for preventing backing off of the cover.

3. A device of the nature disclosed C0111- prising a cylinder, a piston longitudinally v slidable therein, a screw-threaded operating rod connected wit-h the piston, a transversely split cap surounding the rod and forming a'closure for the cylinder, said cap comprising companion half-members having intermeshing engagement with the cylinder when closed, to maintain the cap against movement relative to the cylinder, and internally screw-threaded portions each forming a halfnut engaging the rod, the half-members being transversely separable to disengage the half-nut portions from the rod and to uncover the cylinder bore so as to permit a removal of the rod and piston, and releasable means for maintaining the cap members against separation.

In testimony whereof he attixes his signature.

JOSEPH ETTEMA. 

